6. Slouching

Not only is hunching over all day incredibly bad for your spine in the long run but it also has a number of not-so-good effects in the here and now in terms of how others perceive you. A slumped posture sends the message that you're lazy or lack confidence — neither of which are characteristics you'd like people to remember you by. In contrast, standing up straight makes your muscles appear more taut and defined, and shows that you're self-assured, which is a huge turn-on for women.